Table 2.
Diagnostic performances of the features
| Feature name |
Parameter distribution
*
|
P- value # | Specificity | Sensitivity | Accuracy | AUC | |
|---|---|---|---|---|---|---|---|
| Benign | Malignant | ||||||
|
Elongation
|
0.84 ± 0.13
|
0.87 ± 0.11
|
0.39
|
0.11
|
0.89
|
74.19
|
0.58
|
|
ADC
|
1.04 ± 0.21
|
1.50 ± 0.43
|
0.00
|
0.67
|
0.92
|
87.10
|
0.85
|
|
SER |
1.20 ± 0.22 |
1.00 ± 0.50 |
0.01 |
0.33 |
0.97 |
84.95 |
0.71 |
|
Correlation |
0.65 ± 0.16 |
0.60 ± 0.17 |
0.23 |
0.06 |
0.96 |
78.49 |
0.60 |
|
Inertia |
1995.34 ± 1177.11 |
2773.68 1891.29 |
0.03 |
0.17 |
0.93 |
78.49 |
0.64 |
|
Entropy
|
8.48 ± 1.30
|
7.90 ± 1.34
|
0.09
|
0.11
|
0.99
|
81.72
|
0.64
|
|
Inverse Difference |
0.10 ± 0.05 |
0.09 ± 0.03 |
0.22 |
0.11 |
0.97 |
80.65 |
0.65 |
|
Sum average
|
310.21 ± 37.83
|
285.58 ± 34.20
|
0.01
|
0.11
|
0.99
|
81.72
|
0.70
|
|
Sum variance
|
9235.63 ± 2999.89
|
10078.03 ± 3168.82
|
0.29
|
0.00
|
1.00
|
80.65
|
0.57
|
|
Sum entropy |
6.76 ± 0.87 |
6.29 ± 0.90 |
0.04 |
0.11 |
0.99 |
81.72 |
0.66 |
|
Difference average |
32.44 ± 10.15 |
38.73 ± 14.30 |
0.03 |
0.28 |
0.93 |
80.65 |
0.66 |
|
Difference variance |
820.01 ± 486.86 |
1042.80 636.38 |
0.10 |
0.06 |
0.99 |
80.65 |
0.62 |
|
Difference entropy |
5.40 ± 0.44 |
5.16 ± 0.47 |
0.04 |
0.11 |
0.99 |
81.72 |
0.66 |
| Information Correlation 1 | −0.58 ± 0.12 | −0.61 ± 0.14 | 0.43 | 0.11 | 0.95 | 78.49 | 0.58 |
Note: 1. #Computed with paired-sample t-test.
2.*The distribution of the variables are denoted in form of Mean ± Standard Deviation.
Statistical analysis of the independent 3.0-Tesla patients group. For each individual variable, its diagnostic performance is tested through ROC analysis on 1.5-Tesla patients group. The five variables (highlighted in italic) when combined together to consist of a highly diagnostic feature subset is shown to outperform over any individual variables in Table 3.